git.sur5r.net Git - cc65/blob - src/ld65/fragment.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                fragment.c                                 */
   4 /*                                                                           */
   5 /*                        Code/data fragment routines                        */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998-2011, Ullrich von Bassewitz                                      */
  10 /*                Roemerstrasse 52                                           */
  11 /*                D-70794 Filderstadt                                        */
  12 /* EMail:         uz@cc65.org                                                */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 /* common */
  37 #include "fragdefs.h"
  38 #include "xmalloc.h"
  39
  40 /* ld65 */
  41 #include "error.h"
  42 #include "fragment.h"
  43 #include "objdata.h"
  44 #include "segments.h"
  45
  46
  47
  48 /*****************************************************************************/
  49 /*                                   Code                                    */
  50 /*****************************************************************************/
  51
  52
  53
  54 Fragment* NewFragment (unsigned char Type, unsigned Size, Section* S)
  55 /* Create a new fragment and insert it into the section S */
  56 {
  57     Fragment* F;
  58
  59     /* Calculate the size of the memory block. LitBuf is only needed if the
  60      * fragment contains literal data.
  61      */
  62     unsigned FragSize = sizeof (Fragment) - 1;
  63     if (Type == FRAG_LITERAL) {
  64         FragSize += Size;
  65     }
  66
  67     /* Allocate memory */
  68     F = xmalloc (FragSize);
  69
  70     /* Initialize the data */
  71     F->Next      = 0;
  72     F->Obj       = 0;
  73     F->Sec       = S;
  74     F->Size      = Size;
  75     F->Expr      = 0;
  76     F->LineInfos = EmptyCollection;
  77     F->Type      = Type;
  78
  79     /* Insert the code fragment into the section */
  80     if (S->FragRoot == 0) {
  81         /* First fragment */
  82         S->FragRoot = F;
  83     } else {
  84         S->FragLast->Next = F;
  85     }
  86     S->FragLast = F;
  87
  88     /* Increment the size of the section by the size of the fragment */
  89     S->Size += Size;
  90
  91     /* Increment the size of the segment that contains the section */
  92     S->Seg->Size += Size;
  93
  94     /* Return the new fragment */
  95     return F;
  96 }